Draft regulator



May 17, 1927.

F. T. HOPE DRAFT REGULATOR Filed Aug. 4. 1924 INVENTOR five end fflqoeATTORNEY Patented May 17, 1927.

UNITED STATES PATENT OFFICE. I

rannnnrox T. HOPE, or SEATTLE, WASHINGTON, ASSIGNOR or ONE-FOURTH Toenonen A; MEAGHER, or SEATTLE, WASHINGTON.

DRAFT REGULATOR.

Application filed August 4, 1924. Serial No. 730,046.

arresters ofthe character above referred to.

More specific objects and advantages of the invention, which will appearin the fol-.

lowing specification, being attained by the means and deviceshereinafter described and claimed. I i

An embodiment of the invention is illustratedin the accompanyingdrawing, where- Figure 1 is a transverse vertical section of my improvedapparatus mounted upon an upright steam boiler; and Fig. 2 is ahorizontal section on line. 22 of Fig. 1.

In said drawing, the reference numeral 5 represents the shell of acylindrical upright steam boiler such as utilized with logging 2 enginesor the like. As shown, said boiler shell is provided with a conicalportion 6 through which smoke, sparks and other combustipn productstravel to a cylindrical stack flue r According to the present inventionthere is providedabout the flue 7 an annular tank 8 which is open at thetop and is provided with a floor. 9 of a trough shape, preferably, intransverse section. The inner peripheral wall 1001: said tank, as shown,projects upwardly from a frusto-conical shaped bearing plate 11 which issupported upon van angle iron attachment 12 of the boiler shell.

The outer peripheral wall of the tank con? sists of a plate 13 which, asshown, extends as at 13 below the tank and terminates in aflange 14 toreceive coupling bolts 15' a roundedperipheral stack 7 and providescommunicative connection between the two stacks.

Positioned between the two above named stacks 7 and 18 andconcentrically of their axis is a dome shaped hood 19 having,preferably, a plane central roof portion 20 and portion 21 substantiallyas shown in Fig. 1'. V

The hood extends diametrically to about midway between the peripheralwalls of the tank 8 thereby aflording passage at 22 and 23 ofapproximately equal widths. As

shown, the hood is supported and maintained against lateral displacementby suitable means such, for example, as bracket pieces 24: and stays 25secured to the inner and outer Walls 10 and 13, respectively, of 7 thetank. Secured to and depending from the roof portion 20 of the hood is adetachable hollow conoidal deflector, preferably of cast iron, which isarranged to have its axis 00- incide with the axis of the opposing flue7. The chamber 27 within said deflector servesasa heat insulating spacewhich is advantageously provided with vent open ings 28. p Secured tothe inner and outer walls 10 and 13, respectively, of the tank andadjawithin the tank said service pipe ispro- Y vided with a nozzle 32which is disposed to tank is a'water overflow'pipe 38 having a pivotalconnection at39 with a waste-water pipe 40.

As shown, the pipe 38 is disposed in an inclined position to enable thepipe to be swung downwardly by the force of gravity subject to theaction of a controlling cable 41 which passes over a guide pulley 42 toa fastening means (not shown) convenient to the attendant. 43 and 44represent ventilating opening provided at different elevations in theplate part 13 to afford a circulation of air to and from and within thespace below tank 8 for cooling the floor 9 thereof.

To further prevent the tank from becoming unduly hot the wall 10 and thebearing plate 11 are of internal diameters sufficient to provide airinsulating spaces between the same and the boiler members 6 and 7.

Such insulating of the tank and the supporting structures pertainingthereto is of importance as a means for obviating an excessiveevaporation of water from the tank, especially in places where water maybe obtained only with difiiculty.

In operation, the gaseous combustion products, oftentimes includingsparks and small particles of burning fuel, emitted from the flue 7 aredeflected by the hood 19 and deflector 26 downwardly through passage 22into water containing tank, wherein the greater part of the solids aredeposited and the remainderprincipally smoke or gas escapes beneath therim of the hood 19 and thence upwardly through passage 23, uptake 17,and stack 18 into the atmosphere.

The travel of the combustion products delivered from the boiler stack orflue 7 are clearly indicated by feathered arrows in Fig. 1. I

The baffles 29 and 30 not only serve as side walls to the portion ofsmoke passage within the tank, but also serve to effectually preventswashing of the water within the tank due to vibratory or tiltingmovements of the associated boiler. Normally the tank drain 33 is closedby means of the valve 37 and water is supplied through the service pipe31 into the tank to an elevation determined by the elevation of theinlet end of the overflow pipe 38 which, as illustrated is regulated bymeans of the cable 41.

By raising or lowering the overflow pipe the Water level within the tankis raised'or lowered to diminish or increase the effective sizes of thepassage way below the lower edge of the hood to correspondingly decreaseor promote the boiler draft. Under ordinary operating conditions thewater is preferably fed into the tank in a small continuous stream. I

When the tank is to be cleaned the valve 37 is opened for drawing thewater through drain 33 from the tank, whereupon the valve for theservice pipe 31 is opened to its fullest extent to effect a largedelivery of water through the nozzle 32 for cleaning the floor 9. Suchwater discharge upon the floor flushes the latter to cause dirt orsedimentary matter to be washed into the gutter 34 and thence dischargedinto the drain 33.

While I have illustrated the preferred embodiment of the invention, I donot wish to confine myself to the specific construction shown except aslimited by the claims.

What I claim, is,

1. In a draft controller for stacks, a Water tank surrounding the stackin spaced-apart relation, a smoke uptake mounted on said tank, a hoodlocated within said uptake and extending over the stack and a portion ofthe tank, said hood having vent holes in the top thereof and a hollowconoidal deflector detachably connected to and depending from the top ofthe hood, the chamber within said deflector having direct communicationthrough said vent holes with the space thereabove in said uptake.

7' In a draft controller for stacks, an an nular water tank surroundingthe stack, a hood prm ided above the stack flue and extending over theinner portion of the tank, and circular baffles being disposed atsubstantially the same elevation and secured to the inner and outerwalls respectively of the tank said baffles converging downwardly withrelation to each other to provide a restricted opening in the top of thetank: and below the peripheral outlet of the hood.

3. In a draft controller for stacks, a water tank surrounding the stack,said tank being provided with an annular trough shaped floor, apartition provided upon the tank floor, a drain pipe connected to saidfloor at one side of the partition, a water supply pipe at the otherside of the partition, said supply pipe terminating in a nozzle, arranged to discharge water circumferentially of the floor for flushingthe same, a hood provided above the stack and extending partly over thetank, and means for regulating the depth of water in the tank for'controlling'the gas discharge area beneath the lower edge of the hood.

4. Ina draft 'controllerfor stacks, an annular water tank surroundingthe stack, a hood positioned above the stack for 'direct ing combustionproducts therefrom into the tank, means for controlling thegas'discharge area beneath the lower edge of the hood, said meansconsisting of a water supply pipe and a vertically adjustable overflowpipe,

and means for flushing the floor of the tank, said last named means"including said supply pipe and a valved drain pipe arranged and locatedwith respect to each -other that the flushing water is caused to'travelcircuitously upon the floor of the tank for almost the entirecircumference thereof.

5. In a draft controller for stacks, an annular water tank surroundingthesta ck',-av

smoke-uptake extending upwardly from said tank, a hood positioned abovethestackfor directing combustion products therefrom into the uptake byWay of the tank, means for controlling the gas discharge area beneaththe lower edge of the hood, and means for flushing the floor of thetanldsaid last named means including a Water supply pipe and a' valveddrain pipe arranged and located with respect to each other that'theflushing Water from the supply pipe is caused to travel circuitouslyupon the floor of the tank for almost the entire circumference thereof.

6v In a draft controller for stacks, an annular Water tank surroundingthe stack, a smoke-uptake extending upwardly from said tank, a hoodpositioned above the stack for directing combustion productstherefrominto the uptake by Way of the tank, means for controlling the gasdischarge area beneath the loWer edge of the hood, said means consistingof a Water supply pipe and a vertically adjustable overflow pipe, and

means for flushing the floor of the tank, said last named meansincluding said supply'pipe and a valved drain pipe arranged and locatedWith respect to each other that the flushing Water is caused to travelcircuitously upon thefloor of the tank for almost the entirecircumference thereof.

7. The combination With a boiler shell having a conical upper portionsurmounted by a stack of an. annular Water tank surrounding the stack, asupport for the tank, said support consisting of plates for the innorand outer Walls respectively of the tank, the plates for theouter wallbeing provided with vent openings for the circulation of cooling airWithin the space below the tank, means for securing said plates to theboiler shell, an uptake connection supported upon the outer wall of thetank, a hood provided Within said uptake connection and above the stack,said hood extending partly over the tank, and means for regulating thedepth of Water in the tank for controlling the gas discharge areabeneath the outer periphery of said hood.

Signed at Seattle, l-Vashington, thisQnd day of July, 1924.'

FREDERICK T. HOPE.

